Mechanical stoker.



W. H. STROUSE. MECHANICAL STOKER. APPLICATION FILED JULY 2a, 1908.

Patented Apr. 13

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WILLIAM II. STROUSE, OF OSKALOOSA, IOWA, ASSIGNOR TO AMERICAN AUTOMATIC STOKER COMPANY, A CORPORATION OF ARIZONA TERRITORY.,

MECHANICAL STOICER.

Specification of Letters Patent.

Patented April 18, 1909.

Original application filed February 8, 1908, Serial No. 414,087. Divided and this application filed July 23, 1908. Serial No. 445,003.

To all whom it may concern:

Be it known that I, ll inrnin H. S'rRoUsn, a citizen of the United States, residing at Oskaloosa, in the county of Mahaska and State of Iowa, have invented certain new and useful Irn rovenients in Mechanical Stoker's and I do ereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification,and to the letters of reference marked thereon.

This invention relates to improvements in plungers adapted for use in that type of mechanical stokers illustrated in Letters-Patent heretofore granted to me, Nos. 840,722 and 840,723, dated January 8, 1907, the present application being a division of my application, Serial No. 414,087, filed Feb. 3, 1908.

The object of the invention is to provide a form of plunger which will more effectually distribute the fuel in the fire-box when operated or reciprocated back and forth in a right line.

' The invention consists in certain novel details of construction and combinations and arrangements of parts, all as will be hereinafter described and pointed out particularly in the appended claims.

Referring to the accompanying drawings: Figure l is a perspective view of the nose or forward end of the plunger, a portion of the ledges or flanged.

body of the plunger being indicated in dotted lines. Fig. 2 is a top plan view, and Fig. 3 is a side elevation of the nose or fuel distributing end of the plunger.

Like letters of reference in the several views indicate the same parts.

The plunger of the present invention at its forward end is provided with fuel supporting ledges or flanged portions A, and from these portions the surface at each side of the center projection B curves upwardly and inwardly with a curve of gradually decreasing radius, thereby forming concave surfaces C, which will give the major forward impetus to the fuel which is to be distributed to the rear and side portions of the fire-box. In the present structure the projecting surfaces C ir-erge gradually into the fuel supporting flanges or ledges A, and into the central projection B, whereby the front of the said central projection B is made relatively broad, to cause a certain proportion of the fuel to be projected directly in line with the path of travel of the plunger, while the major portion of the fuel will be distributed laterally, and those portions of the fuel intended to be thrown to the sides of the firebox will be given the greatest impetus, inasmuch as their path of free travel is the greater.

Immediately in rear of the surfaces O the nose piece is provided with side pockets D, preferably having downwardly and outwardly inclined walls terminating near the bottom in a somewhat sharp outward curvature, whereby fuel held in said pockets and pushed into the fire-box will discharge on the inward stroke of the plunger at each side of the nose, and will be thereby distributed to the sides and corners of the lire-box at each side of the door opening. In the preferred construction, these transverse pockets have their rear walls at the outer edges curved forwardly to a slight extent, as at E, in order to retain the fuel on the forward stroke and to discharge the same after the nose piece has started on its backward movement. In other words, the outwardly flaring forward walls E of the pockets constitute the projecting or distributing faces, while the rear walls E, owing to their forward curvature, constitute retaining walls against which the fuel will seat without tendency to discharge during the rapid forward movement of the plunger.

Extending rearwardly from the transverse pockets are projections G, adapted for the reception of the forward end of a sheet n'ietal body portion, indicated at H in dotted lines. This construction permits of the production. of the nose piece of the plunger in a single integral casting, well adapted to withstand wear and rough usage, and at the same time permits of the firm attaclunent of the same to the forward end of a relatively light body portion which may be conveniently made of sheet metal and of an inverted trough formation so as to overlie and inclose the power mechanism for reciprocating the plunger, as set forth in the before mentioned patcuts and application.

Having thus described the invention, what I claim as new, and desire to secure by Letters-Patent, is:

1. A head for a reciprocating plunger for mechanical stokers having a fuel projecting porting flanges, concave fuel deflecting surnose'at its forward end provided with con- 7 at each side of the center line, and open cave deflecting faces and transversely openfaces ing pockets in rear of said deflecting faces, whereby the fuel will be discharged l rear of said deflecting surfaces.

5. A head for a reciprocating fuel projecting plunger for mechanical stokers, embodying a nose piece having pockets therein open from the pockets transversely of the line of movement of the nose piece. I

2. A head for a reel rocating plunger for f mechanical stokers em odying a nose piece having concave deflecting faces and pockets having transversely inclined bottonr walls, itnrear of sepd deflect/31g faces having fiilelf re; fuel retlainnfl reahr wills tandf fulel plrloectcilng alnlng Sill aces On 611' rear SICLGS an U6 IOIWELI'C Va S, W 6T6 y 3 6 116 \VI e 15- discharging surfaces on their forward sides, charged transversely during the rearward whereby the fuel Wlll be discharged from the movement of the plunger.

pockets during the rearward movement of l 6. Ahead for arec1procatory fuel projectthe plunger. I mg plunger embodying a nose piece having l 3. A head for a reciprocating plunger for bottom forwardly extending fuel supporting mechanical stokers, having a fuel projecting flanges and concave fuel deflecting surfaces nose at its forward end embodying concave at each side of the center deflecting faces, fuel su porting flanges prosurfaces merging gradually into the supportjecting forwardly from t e bottom of said deing flanges at the bottom and merging graduflecting faces and pockets having inclined II ally into and forming a relatively broad cenwalls located in rear of said deflecting faces tral projection between them, substantialb as described. nose piece. -VYILLIAM H. STROUSE.

4. A head for a reciprocating plunger for Witnesses: mechanical stokers, having a fuel projecting ll". 0. N UGENT, nose at its forward end embodying fuel sup- E. D. fl ALTON.

and opening transversely at the sides of the sided transversely arranged fuel pockets in c at the top and sides of the nose piece, and

line, said deflecting 

